Let It Be (1970-1974): Chapter 15 of the series 18 decades of life in Mexico in the twentieth century. Images of the cultural, social and political life in Mexico from 1970 to 1974. During the presidential term of Luis Echeverria Alvarez fantasies of prosperous and modern country it dissolves; Mexico live in political crisis. It is a time of omnipotence, barbarism, and violence intervention: the world seeks new ways. In Mexico, it held the World Cup, unionism is strengthened and inflation responds to the continuing economic imbalances.